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9.1.3 How oxygen increased

What was the oxygen content of Earth's early atmosphere?

A

It contained some oxygen.

B

It contained high levels of oxygen.

C

It contained mostly oxygen.

D

It contained little or no oxygen.

9.1.3 How oxygen increased Flashcards

  1. GCSE
  2. /Chemistry
  3. /9.1.3 How oxygen increased

Flashcards for AQA GCSE Chemistry 9.1.3 How oxygen increased, covering the key terms, definitions and equations you need to recall for Paper 1 and Paper 2. 20 cards, matched to the AQA GCSE Chemistry (8462) specification. Recall questions account for roughly 40% of marks at GCSE Chemistry, so these target the marks you can secure before the paper starts.